<template>
    <el-row class="home" :gutter="20">
      <el-col :span="8" style="margin-top: 20px">
        
        <!--左侧上方卡片  -->
        <el-card shadow="hover">
          <div class="user">
            <img :src="getImageUrl('user')"  class="user" />
            <div class="user-info">
              <p class="user-info-admin">Admin</p>
              <p class="user-info-p">超级管理员</p>
            </div>
          </div>
          <div class="login-info">
            <p>上次登录时间:<span>2022-7-11</span></p>
            <p>上次登录的地点:<span>北京</span></p>
          </div>
        </el-card>
          
        <!--左侧下方表格  -->
        <el-card shadow="hover" class="user-table">
          <el-table :data="tableData">
              <el-table-column 
                v-for="(val, key) in tableLabel"
                :key="key"
                :prop="key"
                :label="val"
              >
              </el-table-column>
          </el-table>
        </el-card>
  
      </el-col>
     
        <!-- 右侧 -->
       <el-col :span="16" style="margin-top: 20px;">
        <!--右侧卡片  -->
            <div class="num">
                <el-card
                    :body-style="{display:'flex',padding:0}"
                    v-for="item in countData"
                    :key="item.name"
                >
                    <component :is="item.icon" class="icons" :style="{background:item.color}"></component>
                    <div class="detail">
                        <p class="num">￥{{ item.value }}</p>
                        <p class="txt">￥{{ item.name }}</p>
                    </div>
                </el-card>
            </div>
            <!-- 右侧图表  -->
            <el-card class="top-echart">
                <div ref="echart" style="height: 280px"></div>
            </el-card>

            <div class="graph">
              <el-card >
                <div ref="userEchart" style="height: 240px"></div>
              </el-card>
              <el-card >
                <div ref="videoEchart" style="height: 240px"></div>
              </el-card>
            </div>
            
       </el-col> 
    </el-row>
</template>

<script setup>
import {ref, computed,onMounted,reactive,getCurrentInstance} from 'vue'
import api from '@/api/api'
import * as echarts from 'echarts'


const { proxy } = getCurrentInstance()
const observer=ref(null)
const getImageUrl = (user) => {
    return new URL(`../assets/images/${user}.png`, import.meta.url).href
}
//这个tableData是假数据，等会我们使用axios请求mock数据
const tableData = ref([])

const tableLabel = ref({
    name: "课程",
    todayBuy: "今日购买",
    monthBuy: "本月购买",
    totalBuy: "总购买",
})

const countData=ref([])

const chartData=ref([])


//这个是折线图和柱状图 两个图表共用的公共配置
const xOptions = reactive({
      // 图例文字颜色
      textStyle: {
        color: "#333",
      },
      legend: {},
      grid: {
        left: "20%",
      },
      // 提示框
      tooltip: {
        trigger: "axis",
      },
      xAxis: {
        type: "category", // 类目轴
        data: [],
        axisLine: {
          lineStyle: {
            color: "#17b3a3",
          },
        },
        axisLabel: {
          interval: 0,
          color: "#333",
        },
      },
      yAxis: [
        {
          type: "value",
          axisLine: {
            lineStyle: {
              color: "#17b3a3",
            },
          },
        },
      ],
      color: ["#2ec7c9", "#b6a2de", "#5ab1ef", "#ffb980", "#d87a80", "#8d98b3"],
      series: [],
})

const pieOptions = reactive({
  tooltip: {
    trigger: "item",
  },
  legend: {},
  color: [
    "#0f78f4",
    "#dd536b",
    "#9462e5",
    "#a6a6a6",
    "#e1bb22",
    "#39c362",
    "#3ed1cf",
  ],
  series: []
})


const getChartData = async () => {
  const {orderData,userData,videoData}=await api.getChartData()
  //对第一个表格进行渲染
  xOptions.xAxis.data = orderData.date
  xOptions.series=Object.keys(orderData.data[0]).map(val => ({
      name:val,
      data:orderData.data.map(item => item[val]),
      type:'line'
  }))
  const oneEchart =echarts.init(proxy.$refs['echart'])
  oneEchart.setOption(xOptions)

  //对第二个表格进行渲染
  xOptions.xAxis.data = userData.map(item => item.date)
  xOptions.series = [
    {
      name: "新增用户",
      data: userData.map(item => item.new),
      type: "bar",
    },
    {
      name: "活跃用户",
      data: userData.map(item => item.active),
      type: "bar",
    },
  ]
  const twoEchart = echarts.init(proxy.$refs["userEchart"])
  twoEchart.setOption(xOptions)

  //对第三个表格进行渲染
  pieOptions.series = [
    {
      data:videoData,
      type:"pie",
    }
  ]
  const threeEchart = echarts.init(proxy.$refs["videoEchart"])
  threeEchart.setOption(pieOptions)

  //监听页面的变化
  observer.value = new ResizeObserver((en) => {
    oneEchart.resize()
    twoEchart.resize()
    threeEchart.resize()
  })
  //容器存在
  if(proxy.$refs['echart']){
    observer.value.observe(proxy.$refs['echart'])
  }

}

onMounted(() => {
    api.getTableData().then(res => {
        tableData.value = res.tableData
    })

    api.getCountData().then(res => {
        countData.value = res
    })

   
    getChartData();
})
</script>

<style lang="less" scoped >

.home {
    height: 100%;
    overflow: hidden;
    .user {
        display: flex;
        align-items: center;
        border-bottom: 1px solid #ccc;
        margin-bottom: 20px;
        img {
            width: 150px;
            height: 150px;
            border-radius: 50%;
            margin-right: 40px;
        }
        .user-info {
          p{
            line-height: 40px;
          }
          .user-info-admin {
            font-size: 35px;
          }
          .user-info-p {
            color: #999;
          }
        }
  }
  .login-info {
    p {
      line-height: 30px;
      font-size: 14px;
      color: #999;
      span {
        color: #666;
        margin-left: 60px;
      }
    }
  }
  .user-table{
    margin-top: 20px;
  }
  .num{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    .el-card {
        width: 32%;
        margin-bottom: 20px;
    }
    .icons{
        width: 80px;
        height: 80px;
        font-size: 30px;
        text-align: center;
        line-height: 80px;
        color: #fff;
    }
    .detail{
        margin-left: 15px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        .num{
            font-size: 30px;
            margin-bottom: 10px;
        }
        .txt{
            font-size: 15px;
            text-align: center;
            color: #999;
        }
    }
  }
  .graph{
    display: flex;
    margin-top: 20px;
    justify-content: space-between;
    .el-card {
        width: 48%;
       height: 260px;
    }
  }
}

</style>